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import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Label;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main {
public static void main(String[] argv) {
JFrame demo = new JFrame("GridBag demo, to center a component");
JPanel parentPanel = new JPanel();
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.CENTER;
gridbag.setConstraints(parentPanel, constraints);
parentPanel.setLayout(gridbag);
Label centerLabel = new Label(" AAA...");
parentPanel.add(centerLabel);
demo.add(parentPanel);
demo.setSize(500, 500);
demo.setVisible(true);
}
}
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